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Physiology Exam III WITH COMPLETE QUESTIONS
AND CORRECT VERIFIED ANS WERS LATEST UPDATE
JUST RELEASED THIS YEAR
Question: In its simplest form, which relationship between pressure and volume does the ideal
gas law demonstrate?
In its simplest form, which relationship between pressure and volume does the ideal gas law
demonstrate?
They are independent of one another.
They are directly proportional.
They are positively correlated.
They are inversely proportional. - ANSWER✔✔They are inversely proportional.
Question: When the respiratory diaphragm contracts, it flattens, lowering the floor of the
thoracic cavity. At the same time, the intercostal muscles pull the ribs up and out. The active
forces of the muscle groups cause a(n) __________ (increase/decrease) in thoracic volume.
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Given the relationship between pressure and volume, this would cause pressure within the
lungs to __________ (increase/decrease).
Select the correct term for each blank in the selection above.
decrease; decrease
increase; decrease
decrease; increase
increase; increase - ANSWER✔✔increase; decrease
Question: If an alveolus with an initial volume of 3 ml of air with a total pressure of 810 mmHg
decreases in volume to 1.7 ml, what would the new pressure be and in which direction would
air flow? Assume you are at sea level.
459 mmHg; air flow into the alveolus from the environment
1429 mmHg; air flow out of the alveolus to the environment
760 mmHg; no net movement of air
459 mmHg; air flow out of the alveolus to the environment
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1429 mmHg; air flow into the alveolus from the environment - ANSWER✔✔429 mmHg; air flow
out of the alveolus to the environment
Question: Which of the following variables do you need to know in order to calculate the
partial pressure of a gas?
Check all that apply.
Hints
Check all that apply.
the percentage of the gas
the total pressure in the atmosphere
the volume of the container that the gas is in
the water vapor pressure
the percentage of the other gases that comprise the atmosphere - ANSWER✔✔the water vapor
pressure
the percentage of the gas
the total pressure in the atmosphere
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, Page 4 of 70
Question: The additional air that you can exhale after a normal exhale is the ________.
residual volume
inspiratory reserve volume
tidal volume
expiratory reserve volume - ANSWER✔✔expiratory reserve volume
Question: Contraction of the muscles of inspiration most directly produces what change?
Contraction of the muscles of inspiration most directly produces what change?
A decrease in thoracic pressure
An increase in thoracic volume
An increase in alveolar volume
A decrease in alveolar pressure - ANSWER✔✔An increase in thoracic volume
Question: What key property of the bronchi increases as the average diameter of the
passageways decreases? As a hint, it also occurs in the arterial vasculature.
4
SUCCESS!
Physiology Exam III WITH COMPLETE QUESTIONS
AND CORRECT VERIFIED ANS WERS LATEST UPDATE
JUST RELEASED THIS YEAR
Question: In its simplest form, which relationship between pressure and volume does the ideal
gas law demonstrate?
In its simplest form, which relationship between pressure and volume does the ideal gas law
demonstrate?
They are independent of one another.
They are directly proportional.
They are positively correlated.
They are inversely proportional. - ANSWER✔✔They are inversely proportional.
Question: When the respiratory diaphragm contracts, it flattens, lowering the floor of the
thoracic cavity. At the same time, the intercostal muscles pull the ribs up and out. The active
forces of the muscle groups cause a(n) __________ (increase/decrease) in thoracic volume.
1
SUCCESS!
,Page 2 of 70
Given the relationship between pressure and volume, this would cause pressure within the
lungs to __________ (increase/decrease).
Select the correct term for each blank in the selection above.
decrease; decrease
increase; decrease
decrease; increase
increase; increase - ANSWER✔✔increase; decrease
Question: If an alveolus with an initial volume of 3 ml of air with a total pressure of 810 mmHg
decreases in volume to 1.7 ml, what would the new pressure be and in which direction would
air flow? Assume you are at sea level.
459 mmHg; air flow into the alveolus from the environment
1429 mmHg; air flow out of the alveolus to the environment
760 mmHg; no net movement of air
459 mmHg; air flow out of the alveolus to the environment
2
SUCCESS!
,Page 3 of 70
1429 mmHg; air flow into the alveolus from the environment - ANSWER✔✔429 mmHg; air flow
out of the alveolus to the environment
Question: Which of the following variables do you need to know in order to calculate the
partial pressure of a gas?
Check all that apply.
Hints
Check all that apply.
the percentage of the gas
the total pressure in the atmosphere
the volume of the container that the gas is in
the water vapor pressure
the percentage of the other gases that comprise the atmosphere - ANSWER✔✔the water vapor
pressure
the percentage of the gas
the total pressure in the atmosphere
3
SUCCESS!
, Page 4 of 70
Question: The additional air that you can exhale after a normal exhale is the ________.
residual volume
inspiratory reserve volume
tidal volume
expiratory reserve volume - ANSWER✔✔expiratory reserve volume
Question: Contraction of the muscles of inspiration most directly produces what change?
Contraction of the muscles of inspiration most directly produces what change?
A decrease in thoracic pressure
An increase in thoracic volume
An increase in alveolar volume
A decrease in alveolar pressure - ANSWER✔✔An increase in thoracic volume
Question: What key property of the bronchi increases as the average diameter of the
passageways decreases? As a hint, it also occurs in the arterial vasculature.
4
SUCCESS!
